Cui Jun, Chu Yong S, Famodu Olugbenga O, Furuya Yasubumi, Hattrick-Simpers Jae, James Richard D, Ludwig Alfred, Thienhaus Sigurd, Wuttig Manfred, Zhang Zhiyong, Takeuchi Ichiro
Materials Analysis and Chemical Science, GE Global Research Center, Niskayuan, New York 12309, USA.
Nat Mater. 2006 Apr;5(4):286-90. doi: 10.1038/nmat1593. Epub 2006 Mar 5.
Reversibility of structural phase transformations has profound technological implications in a wide range of applications from fatigue life in shape-memory alloys (SMAs) to magnetism in multiferroic oxides. The geometric nonlinear theory of martensite universally applicable to all structural transitions has been developed. It predicts the reversibility of the transitions as manifested in the hysteresis behaviour based solely on crystal symmetry and geometric compatibilities between phases. In this article, we report on the verification of the theory using the high-throughput approach. The thin-film composition-spread technique was devised to rapidly map the lattice parameters and the thermal hysteresis of ternary alloy systems. A clear relationship between the hysteresis and the middle eigenvalue of the transformation stretch tensor as predicted by the theory was observed for the first time. We have also identified a new composition region of titanium-rich SMAs with potential for improved control of SMA properties.
结构相变的可逆性在从形状记忆合金（SMA）的疲劳寿命到多铁性氧化物的磁性等广泛应用中具有深远的技术意义。已开发出普遍适用于所有结构转变的马氏体几何非线性理论。它仅基于晶体对称性和相之间的几何相容性来预测转变的可逆性，这在滞后行为中表现出来。在本文中，我们报告了使用高通量方法对该理论的验证。设计了薄膜成分扩展技术来快速绘制三元合金系统的晶格参数和热滞。首次观察到理论预测的滞后与转变拉伸张量的中间特征值之间存在明确关系。我们还确定了一个富含钛的形状记忆合金的新成分区域，具有改善形状记忆合金性能控制的潜力。
